Dye kettle



Dec. 19, 1961 c. H. AMIDON, JR, ETA]. 3,013,422

DYE KETTLE 5 Sheets-Sheet 1 Filed Jan. 12, 1956 @Pv 01 W. m fa A Mm r; Hmm vi 4" M m j i 1961 c. H. AMIDON, JR, ETA]. 3,013,422

DYE KETTLE Filed Jan. 12, 1956 5 Sheets-Sheet 2 INVENTOR 674K265 A141/004! 7:

ATTORNEYS 1961 c. H. AMIDON, JR., ETAL 3,013,422

DYE KETTLE 3 Sheets-Sheet 3 Filed Jan. 12, 1956 INVENTOR Camus A! A wow,fe.

ATTORNEXS 3,013,422. Patented Dec. 19, 1961 3,013,422 DYE KETTLE CharlesH. Ainidon, Jr., Orange, Mass, and Mortimer G. Hopkins, Merchantville,N.J., assignors to Rodney Hunt Machine Company, Grange, Mass, acorporation of Massachusetts Filed Jan, 12, 1956, Ser. No. 553,650 8Claims. (Cl. 68-18) This invention relates to apparatus for treatingtextiles and more particularly relates to apparatus for dyeing carpets.

The dyeing of fabrics and carpets is usually carried out by repeatedlypassing the fabric or carpet through a liquid dye bath for a period oftime that is sufficient to secure the proper density or depth of color.This type of fabric is processed in the open width, even'as wide as 18ft., and usually has lengths in the range of 100 to 150 yds. After thislength of the fabric is loaded in the dye kettle, the ends aretemporarily sewed together and thus becomes an endless loop of material.This loop rides on a rotating reel which provides a folding and pilingof the material in loose folds in the back of the dye kettle tub, inwhich it is subjected to the action of the dye liquors and then is drawnout of the dye liquors at the front of the tub. This passage of thematerial through the dye liquor is continued for a number of hours,until the proper penetration of dye is obtained. At that time when thedyeing process is completed, the remaining dye liquors are wasted, thegoods are rinsed of superfluous dye, the sewed ends are cut apart, andfabric is removed from the dye kettle.

These dyeing processes are most effectively carried out at a temperatureat or near the boiling point of water and the efiicacy of the dye bathdepends upon the maintenance of a relatively uniform temperature throughthe entire bath. In order to secure uniform dyeing it is also essentialthat the concentration of dye in the dye liquor itself be maintainedsubstantially uniform throughout the tub, even though new dye is addedfrom time to time to attain the proper shade on the carpet. Relativelyminor variations of temperature or concentration of the dye liquorthroughout the bath may produce variations in the final shade of thematerial and may result in uneven dyeing and render the materialunsuitable for commercial use.

For many years the art has sought to provide dye kettles and dye beckswhich would establish and maintain uniform conditions of temperature anddye concerttration. Most of these prior kettles and dye becks, however,have had deficiencies and defects and were not capable of maintaininguniformity of conditions to produce accurate shades of dyeing.

In many of these prior dye becks or kettles steam has been used tomaintain the temperature and this steam is injected adjacent the frontof the tub. This effectively maintains the temperature adjacent thepoint of injection, but the tubs are usually of fairly large size andthere is a substantial temperature drop toward the back of the tub.

In application Serial No. 198,422, filed November 30, 1950, and now U.S.Patent No. 2,706,391, there is disclosed a dye kettle having a curvedbottom with a curved false bottom or baffle mounted thereabove andhaving perforate sections at the center and near the upper edgesthereof. Heat and/or steam is introduced into the space between the twobottoms to cause a circulation of the dye liquor through the perforateportions of the false bottom to establish a figure 8 flow of dye liquorin the tub. It is found that this flow is indispensible to maintain botha uniform temperature and a uniform concentration of dye liquorthroughout the tub so that uniform dyeing can be accomplished. 1

We have now found that in dyeing tufted carpet having a heavy pile,especially where such carpet is relatively wide, i.e., in theneighborhood of twelve to eighteen feet, additional precautions must betaken to obtain an even dyeing. In dye kettles of the type disclosed inPatent No. 2,706,391, the carpet forms a dense accumulation of folds andlayers in the dye liquors obstructing the figure 8 circulation at thecenter, while the dye liquor circulates freely at the ends of the carpetsince there is always a space between the carpet selvedge and the end ofthe tub. This impeded circulation at the center of the tub results in alower temperature and a lower concentration of dye of this centralvolume of dye liquor which results in a lighter pick-up of pigment or astarved condition of dyeing at the center areas, while the selvedgesattain the full depth of shade.

We have found that this center-to-selvedge otfshading may be correctedand a uniform dyeing obtained if circulating pumps are connected to thedye kettle so as to remove dye liquor from the bottom center area ofeach tub end and deliver such liquor via recirculating lines to thecenter area of the machine above the folds of the carpet. The dye liquorrecirculated in this manner displaces a volume of liquor at the centerof the tub forcing it towards the ends of the tub and thereby creating afigure 8 circulation from the center to the ends of the tub as well asfrom the front and back to the center of the tub as taught in Patent No.2,706,391. It is also a feature of the invention that steam may beintroduced into the circulating pump lines so that the optimumtemperature of the dye liquor may be obtained at the center of the tubwhere it was formerly at reduced temperature.

The perforated steam coils and dye distributor pipes at the front andrear of the tub between the false bottom or shell and the bottom arepreferably of the T type with a center inlet and are of a length shorterthan that of the tub. With this arrangement the heating effect and theaddition of dye stuff is emphasized near the center of the carpet tofavor that area where a full depth of shade is most difficult to attain.Since the steam coils terminate short of the ends of the tank and are ofa length smaller than the width of the carpet being dyed, the figure 8front to back circulation in the empty ends of the tub is reduced to aminimum so that a large amount of dye liquor does not circulate past thecarpet selvedges.

A further major problem which has been encountered in the dyeing ofcarpets has been the accumulation of lint or tufts loosened from thecarpet during the dye cycle. This material works its way below the falsebottom or tub liner and accumulates on the pipe coils and lodges incirculation passages when the tub is drained. When cold water is addedin the rinse cycle it causes a condensing effect in the steam coilswhich suck lint and tufts into the steam distribution holes in such amanner that it is extremely difficult to remove, and in some instancesof operation it has been found necessary to remove the panels of thefalse bottom as often as once a week to clear away lint. Thisnecesistates a complete shut-down of the machine and is time consumingand expensive.

Screens have been heretofore designed to catch and collect the lint asfor example where they were placed at the intake of each circulatingpump. With such an arrangement, however, recirculation ceases when thescreen becomes clogged with lint and this causes the faulty dyeing of acomplete load of 120 linear yards of carpet.

According to the present invention replacable screens are provided in atrough which is preferably located between the spreader and reel andabove the dye liquor level. The recirculating pumps discharge throughthe screens into the trough and dye liquor flows by gravity throughdischarge ports at the center area of the trough. With this arrangementany severe clogging of the screens results in a mere overflow of the dyeliquor back into the tub so that circulation is maintained and no damageis done to the carpet being treated. A duplicate screen is provided toquickly replace one that has an accumulation of lint and thus eliminatesshut down of the machine.

It is accordingly a primary object of the present invention to providean improved dyeing apparatus which assures the production of dyed goodsof a uniformly high quality with greater speed, simplicity, and economy.

It is a further object of the invention to provide a dye kettle in whichthe circulation of dye liquid may be controlled and varied.

It is another object of the invention to provide a dye kettle in whichthe dye liquor may be established and maintained at a substantiallyuniform concentration throughout the kettle.

It is another object of the invention to provide a dye kettle in whichthe dye liquor may be maintained at a substantially uniform temperaturethroughout the dye kettle.

It is another object of the present invention to provide a dye kettle inwhich dye liquor is circulated within the kettle to establish a figure 8circulation pattern from the front and back to the center of the tub,and in which dye liquor is further recirculated by pumps to establish asecond figure 8 circulation pattern from the center of the tub to eachend thereof.

It is a further object of the present invention to provide a dye kettlewith provision for collecting and eliminating lint or tufts by means ofscreens so placed that a clogging thereof does not interfere with thecirculation and recirculation in the dye kettle.

It is a further object of the present invention to provide a dye kettlehaving provision for the accumulation and removal of lint or tufts bymeans of removable screens which are easily accessible without anydismantling of the dyeing machine.

It is another object of the invention to provide a dye kettle havingprovision for the elimination of lint or tufts by means of removablescreens which may be removed for cleaning while a duplicate screen isinserted to minimize production loss.

Further objects and advantages of the invention will become apparentupon reference to the appended specification, claims and drawingswherein:

FIGURE 1 is a side elevation of an apparatus embodying the inventionpartially cut away to show interior details of construction;

FIGURE 2 is front elevation of the URE l similarly cut away;

FIGURE 3 is an enlarged fragmentary elevation showing the operation ofthe dye injector;

FIGURE 4 is a fragmentary plan view of the dye injector taken on line4-4 of FIGURE 3; and

FIGURE 5 is a vertical section of the central portion of a dye kettleshowing another embodiment of the invention.

Referring now more particularly to the drawing, there is shown generallyat 5 a dye kettle having spaced vertical end walls 9 and 10, each havingupper and lower longitudinally extending flanges 11 and 12. Extendingbetween walls 9 and at their opposite upper ends are transverseapparatus of FIG- frame members 13 and 14. A curved bottom 15 is weldedat its ends to members 13 and 14 and along its sides to walls 9 and 10,defining with the latter a liquid tight tub or tank for dye liquor orthe like. A battle or false bottom 16, of generally the sameconfiguration as the dye kettle bottom 15, is removably attached to endwalls 9 and 10 and to the bottom member 15 with which it is in spacedsubstantially parallel relation. Perforated plates 17 and 13 areremovably secured to the baflle 16 near the top of the tub and baffle 16is also provided with perforations 19 at its lowermost portion. Theplates 17 and 18 are secured in any suitable manner and may be removedfor access to the pipes or coils between wall 15 and baflle 16.

At its lowermost portion, the bottom 15 is provided with a quick acting,gravity seated drain plug 20 which is opened by a lever 21, pivotallymounted on a bracket 22 secured to side wall 10. Lever 21 is actuated bya foot pedal 26 at the front of the dye kettle and is raised to itsupper position by a spring 23. The lever 21 may be held in its depressedposition by a bracket 25 having notches 24 in which the lever 21engages.

Mounted by any suitable means, not shown, between bottom 15 and baflle16 at an elevated position in the rear of the dye kettle 5 adjacentperforated plate 17 and baffie 16, is a heating coil 30 which ispreferably closed and supplied with hot water or steam from any suitablesource, not shown. A pair of heating coils 31 and 32 are similarlymounted between bottom 15 and bathe 16 adajcent the bottom of the kettle5 opposite an imperforate section of baflle 16. Heating coils 31 and 32are supplied with steam from any suitable source, not shown, and areprovided with spray jets or openings, which expel the steam outwardlyand upwardly between the bottom 15 and the baflie 16 as shown in FIGURE1.

Centrally of curved bottom 15 and substantially centrally of transverseframe members 13 and 14 there is mounted by any suitable means, notshown, an elongated trough 34 having centrally located ports 36 in thesides thereof. Removable screens 38 are supported along the length oftrough 34 by means of flanges 40, or other suitable means, for easyremoval. The trough 34 extends substantially the full length of the dyekettle and is preferably located between the feed reel 128 and thespreader reel 112 just above the tub ledge, as shown in FIGURES 1 and 2.

Rigidly mounted on side wall 10 as by a strap 46 is a dye pail 48. Aconduit 5% extends downward from the dye pail 4S and has an upper valve52 and a lower valve 54. At its lower end, conduit 50 is connected withthe interior of the dye kettle 5 between the bottom 15 and baffle 16through a conduit 56. At a point intermediate of valves 5?. and 54,conduit 50 is connected to a conduit 58 through a horizontal conduit 60.Conduit 58 is connected to a coil 62, similar in construction to coils31 and 32, positioned between baffle 16 and bottom 15 and provided witha plurality of spray openings 64 which are directed upwardly against thebottom 15.

Steam is supplied to the dye injector from a suitable source, not shown,through a conduit 66 controlled by a valve 68. As shown in FIGURES 3 and4, steam conduit 66 is provided with an injection nozzle 70 whichextends into the conduit 58. When steam is supplied to the nozzle 76,aspirating action entrains any surrounding fluid from pipe 60 causing itto flow into cell 62 after thorough mixing with the steam. As anindication of the flexibility of this dye injection system, it will beseen that, by opening valves 52 and 68, a hot mixture of steam and dyeis positively injected into the dye kettle regardless of the level orstatic head of the fluid in dye pail 4S. If valves 52, 6S and 54 are allopened, a portion of the dye liquid is recirculated and thoroughly mixedwith the steam and undiluted dye stuff from psi] 48. When only valves 54and 63 are opened, the dye liquor is mixed with steam from the injector'70 and reintroduced through pipe 58. Plain steam may be injected byclosing all valves except68. Further, at the completion of a dyeingoperation, the pail 48 may be filled with clean water and the valves 52and 68 and, if desired, valve 54 opened for flushing out the entiresystem.

A recirculating pump 72 of any suitable type, such as for instance, acentrifugal type pump of stainless steel having modified impellers topass lint and tufts and to operate at temperatures close to the boilingpoint, has its input connected by means of a conduit 78 and valve 80 toa discharge nozzle 82 mounted to discharge through screen 38 into trough34. Provision may also be made for injecting steam into the output ofpump 72 by means of a conduit 84 connected to conduit 78 through valve86. A similar pump 88 has its input connected through a conduit 90 andvalve 92 to the dye kettle between the bottom and baffie 16 at the end9, and has its output connected through a conduit 94 and valve 96 to adischarge nozzle 98 discharging through screen 38 into trough 34. Asteam line 100 is connected to conduit 94 through valve 192.

Each of the pumps 72 and 88 takes dye liquor from the bottom center ofthe dye kettle between bottom 15 and baffle 16 and delivers this liquorto the trough 34 from which it discharges into the center of the kettleabove the carpet. The warm dye liquor thus removed from adjacent thecoils in the bottom of the kettle displaces a volume of cooler liquor atthe center of the kettle forcing it towards the ends. This action causesthe creation of a figure 8 circulation from the center to the ends ofthe kettle as shall presently be described in more detail. If furtherheating in the center of the kettle is desired steam may be introducedthrough conduits 84 and 100. The injector 7t and recirculating pumps 72and 83 lend considerable flexibility to the system and yield extremelysatisfactory results when utilized in combination. Thus dye or brine maybe added to the kettle either through the bottom dye distributor 62 orthrough the trough 34 or both. Steam may likewise be added eitherthrough the coils 31 and 32 or through the recirculation conduits 78 and94 or both. Recirculation is entirely independent of the injector, ofthe heating, and of the normal circulation in the kettle. Thisversatility renders the kettle particularly advantageous in the tuftedcarpet industry where rapidly changing techniques and materials rendersuch a versatility mandatory.

An upper housing indicated generally at 1&4 and consisting of a roof 106and a pair of side walls 108 and 119 is removably attached to the dyekettle 5 by any suitable means, not shown.

A suitable feeding and plaiting mechanism such as the reel 128 havingside flanges 114 is fixed on a shaft 116 within the housing MP4 abovethe rear end of the kettle 5. A variable speed motor 118 is mounted on abracket 120 secured to the wall 9 and drives the sprocket 122 fixed onthe shaft 116 through a speed reducer 124 and chain 126.

A spreader reel 112 is rotatably supported at its oppo site ends in apair of journals, not shown, supported above the front end of the kettle5. The cloth 139 to be treated is positioned over reel 128 and spreader112, the slack portion being loosely supported in the dye liquor on theupper surface of baffle 16 as shown in FIGURE 1.

In operation, the dye kettle 5 is partially filled with heated waterand, with valves 52 and 68 opened and 54 closed, steam is supplied toinjector 70 introducing dye stuff into the kettle. After the desiredconcentration is reached in the dye liquor, valve 52 is closed and valve54 may be opened to recirculate the dye liquor through coil 62 to insurethorough mixing and to provide additional heating as required. Mixingand heating are also effected by the operation of coils 31 and 32. Inaddition to this, valves 76, 80, 92 and 96 are also opened andcirculating pumps 72 and 88 are operated to provide recirculation of dyeliquor from the lowermost outside porbafile 16 is such that the plaitedcloth slides along the curved bafile toward the spreader 112 and thetension on the cloth between spreader 112 and the baffie 16 is thusminimized. The length of the portion of cloth under tension is alsogreatly decreased over that common in prior installations, allowing agreater proportion of the cloth to be submerged in the dye liquor,thereby materially increasing the speed of thedyeing operation.

As pointed out hereinbefore, the effectiveness of the dyeing operationis dependent upon fully controlled conditions of heat, homogeneity ofdye liquor and thorough exposure of the cloth to the dye liquor. In thepresent apparatus, the application of heat is subject to rigorouscontrol at five places in the dye kettle. The heating coils 3d,which'lie adjacent to perforations 1) in the battle 16 are used tocontrol the heat of the liquor at the rear of the kettle 5 where thecloth enters the liquor and Where it has been found that the propertemperature should be maintained. The coil 31 may be employed to effectadditional heating of the rearward part of the dye kettle, while coils32 and 62 may be used to heat the forward portion of the kettle. Inaddition to this steam heating, recirculated dye liquor is introducedinto the trough 34 and from there into the center of the kettle at thetop thereof. Coils 31, .32 and 62, in addition, function as means forcirculating the heated liquor through the cloth 'at three points, coil31 directing the liquor rearwardly through the perforated area of plate17 and the adjacent cloth and back through the cloth and perforated area19 in the baffle 16, and coils 32 and 62 directing the fluid in anopposite symmetrical path through perforated areas of plates 18 and 16.The circulation path is substantially a figure 8. Where dyeing tuftedcarpets having synthetic pile, such as rayon, nylon, etc., there is atendency for the carpet to form a dense layer on the inner shell of thetub on the baffle 16 of the kettle, obstructing this figure Scirculation at the center and causing a lower temperature of the centralvolume of dye liquor. The circulating pumps 72 and 88 correct thissituation by withdrawing dye liquor from the bottom center of the tub ateach end wall 9 and i0 and delivering this recirculated liquor to thecenter of the machine through the ports 36 in trough 34, therebycreating a further figure 8 circulation from the center to the ends ofthe tanks in addition to the figure 8 circulation to the center from thefront and back of the kettle. It will be seen that by proper employmentof coils 3t 31., 32, 62 and pumps '72 and 88 the temperature gradientthroughout the dye kettle may be reduced to zero and may be kept at anydesired level regardless of the particular material being fed throughthe machine.

Lint or tufts loosened from the backing of the material being dyedduring the dye cycle passes through the circulating pumps 72 and 88 andis collected on removable screens 38 in trough 34 which are easilyaccessible and removable. In the event that the operator fails to cleanthe screens and they clog completely, the entire trough overflows backinto the kettle so that recirculation is maintained.

While the embodiment of the invention shown in FIGURES 1 and 2 reliesupon a pair of pumps 72 and 88 for inducing the center to end figure 8circulation, it is also contemplated that such a circulation may beinduced by apparatus mounted within the dye kettle. Thus referring toFIGURE 5 there is shown the central portion of a dye kettle similar tothat shown in FIGURES 1 and 2 and bearing similar reference numerals toindicate corresponding parts throughout.

In this embodiment of the invention the external pumps and recirculatinglines are replaced by a pair of return chutes 150 and 152 which aremounted on the insides of the side walls 9 and 1% These chutes areconnected at their upper ends to the bottom of a trough 154 having aplurality of screened outlets 156 located centrally of the dye kettle. Ashaft 158 drives a pair of reversely mounted screw thread conveyors 160and 162 and is mounted in a pair of bearings 164 and 166. The left endof the shaft 158 is provided with a drive pulley 168 which may be drivenby the motor 118, shown in FIGURE 2. The trough 154 is mounted with itsbottom below the surface of the dye liquor so that rotation of the shaft158 and screw conveyors 160 and 162 causes a circulation of fluid fromthe trough ends to the trough center. The goods to be dyed are locatedin the area indicated by dot-dash line 1'70.

Circulation of dye is induced through the end chutes 150 and 152 bymeans of the action of the screw thread conveyors 160 and 162, and thecirculating dye liquors are returned to the central portion of the tubthrough the screened apertures 156. The desired figure 8 circulation isthus induced from the center of the dye kettle to side walls 9 and 10,thence upward into the trough 154, and thence down through the apertures156. A minimum amount of equipment is utilized and the drive for thescrew thread conveyor may be very economically obtained from the samesource of power normally present for driving the reel.

The invention may be embodied in other specific forms without departingfrom the spirit or essential characteristics thereof. The presentembodiments are therefore to be considered in all respects asillustrative and not restrictive, the scope of the invention beingindicated by the appended claims rather than by the foregoingdescription.

What is claimed and desired to be secured by United States LettersPatent is:

1. Apparatus for treating textiles comprising a tank for containing atreating fluid and having a curved member forming the bottom, front andrear walls thereof, end walls attached to said curved member, a secondtextile support member substantially parallel to said curved member,heating and circulating means for said fluid positioned between saidcurved member and said second member for producing upward flow of saidfluid from the center of said tank toward said front wall, separateheating and circulating means for said fluid positioned between saidcurved member and said second member for producing an upward flow ofsaid fluid from the center of said tank toward said rear wall, a troughmounted between and substantially parallel to said front and rear wallsover said textile support member, said trough having ports locatedcentrally thereof, including a conduit and means for withdrawing fluidfrom said tank proximate the bottom central area thereof at each endthereof and delivering said withdrawn fluid into said trough and thencethrough said ports back into the center of said tank.

2. Apparatus for treating textiles comprising a tank for containing atreating fluid and having a curved member forming the bottom, front andrear Walls thereof, end walls attached to said curved member, a secondtextile support member substantially parallel to said curved member,heating and circulating means for said fluid positioned between saidcurved member and said second member for producing upward flow of saidfluid from the center of said tank toward said front wall, separateheating and circulating means for said fluid positioned between saidcurved member and said second member for producing an upward flow ofsaid fluid from the center of said tank toward said rear wall, a troughmounted between and substantially parallel to said front and rear wallsover said textile support member, said trough having ports locatedcentrally thereof, a screen removably mounted across said trough, afirst pump connected to one end of said tank near the bottom centralarea thereof for withdrawing fluid therefrom, conduit means connected tothe discharge of said pump for delivering said withdrawn fluid throughsaid screen into said tank for withdrawing fluid therefrom near thebottom central area thereof, and conduit means connected to thedischarge of said second pump for delivering said withdrawn fluidthrough said screen into said trough.

3. Apparatus as set out in claim 2 including means for heating thedischarge of said pumps.

4. Apparatus for treating textiles, comprising a tank for containing atreating fluid and having a curved member forming the bottom, front andrear walls thereof, end walls attached to said curved member, a secondmember substantially parallel to said curved member, means having afirst axis for plaiting a textile onto said second member adjacent saidrear wall, means having an axis spaced from and parallel to said firstaxis for moving said textile along a portion of said second member andremoving it from said tank adjacent the front wall thereof, a troughmounted below and parallel to the axes of said means for plaiting andmeans for moving said textile, said trough having ports locatedcentrally thereof, a screen removably mounted across said trough,heating and circulating means for said fluid positioned between saidcurved member and said second member for producing upward flow of saidfluid from the center of said tank toward said front wall, separateheating and circulating means for said fluid positioned between saidcurved member and said second members for producing an upward flow ofsaid fluid from the center of said tank toward said rear wall, a firstpump connected to one end of said tank near the bottom central areathereof for withdrawing fluid therefrom, conduit means connected to thedischarge of said pump for delivering said withdrawn fluid through saidscreen into said trough, a second pump connected to the other end ofsaid tank near the bottom central area thereof for withdrawing fluidtherefrom, and conduit means connected to the discharge of said secondpump for delivering said withdrawn fluid through said screen into saidtrough..

5. Apparatus as set out in claim 4 including means for introducing atreating substance in said tank comprising: a container for saidtreating substance, a conduit connecting said container with said tank,an injector in said conduit, and means to introduce a heated fluid underpressure into said injector, whereby said treating substance isentrained and mixed with said fluid and injected into said tank underpressure.

6. Apparatus as set out in claim 5 together with a second conduitinterconnecting the first conduit and said tank, adapted to permitrecirculation of a portion of said treating fluid through said injector.

7. An apparatus as set out in claim 1 wherein said conduit is withinsaid tank.

8. An apparatus as set out in claim 7 wherein said fluid withdrawing anddelivering means comprises a pair of screw conveyors positioned in saidtrough.

References (Iited in the file of this patent UNITED STATES PATENTS(Other references on following page) Haeberlin Jan. 19, 1937 McClellanOct. 18, 1938 Nichols Sept. 26, 1939 Milne Nov. 10, 1942 Hilliard Jan."19, 1943 Bond May 11, 1948 Colley Sept. 13, 1949 10 DeMarco Apr. 27,1954 Belcher Apr. 19, 1955 Newcomb May 3, 1955 FOREIGN PATENTS ItalyJune 18, 1953 Great Britain May 19, 1948 France June 21, 1950 UNITEDSTATES PATENT OFFICE CERTIFICATE OF CORRECTION.

Patent. No 3,0l3 4.22 December l9 196 Charles H Amidoni Jr et al0 It ishereby certified that error appears in the above numbered pat entrequiring correction and that the said Letters Patent should read ascorrected below Column l line 36 for "through" read throughout 3 column2 line 59 for "suck" read sucks 3 column 8 line 10 for "tank for" readtrough a second pump connected to the other end of Said tank for Signedand Sealed this 3rd day ofluly 19620 (SEAL) Attest:

ERNEST w. SWIDEE 7 DAVID A D Commissioner of Patent Attesting Officer

